Modelling and hull vibration calculation of very large container ship

Fenglei Han, Ankang Hu, Yachong Liu, Chunhui Wang 

Harbin Engineering University, Nantong str. 145, Harbin, P.R. China

Hull vibration is inevitable in large vessel’s operation. Too large hull vibration will not only cause damage to the hull structure, but also will affect the normal use of marine equipment and crew at work and life. Therefore, to predict the performance of the ship's structure vibration in ship design stage is essential, which can guide reasonable solutions and necessary damping measures. The vibration calculation report includes: Ship’s free vibration calculation and forced vibration response calculations caused by vibration source on board the ship. The former is mainly to obtain the free vibration characteristics of the whole ship structure, to find hull’s 1~3 order of vibration modes which are most likely to occur and the corresponding frequency values. The latter is mainly get the vibration response of hull ship’s forced vibration caused by excitation source, to avoid low-frequency vibration’s affect to the work and life of the crew. Its response should meet the relevant standards and requirements.